74 results about "BACnet" patented technology

BACnet objects and methods for efficiently monitoring the communication status of networks and devices in a building automation and control system are presented. A pair of bus communication status objects, including a server object and a client object, provide the communication status of an MS/TP network as an OCTET String transmitted only upon a change of value (COV) of the communication status of a device on the network. Individual devices may be monitored with a device communication status object, in conjunction with or apart from the bus communication status objects. For MS/TP devices, automatic configuration and monitoring in a controller is provided. For other devices, a user interface is provided through a graphical tool to allow configuration to specify the desired device and/or network for monitoring.

A building management system and method are disclosed. The building management system includes: a central control system connected with a network and centrally controlling at least one sub-system accommodated in a building; a multi-air-conditioner system including an outdoor unit and one or more indoor units connected with the outdoor unit; a BACnet gateway serving as a connection passage of the central control system and the multi-air-conditioner system to allow the central control system to centrally control the multi-air-conditioner system; and a remote integrated management server that controls the multi-air-conditioner system by interworking with the BACnet gateway. Because detailed information can be managed through the remote integrated management server, that an existing building management system fails to do, the user convenience can be improved.

In a BACnet Internetwork, a modular concept is implemented to permit interchangeable protocol conversion between a host protocol like logic-level BACnet MS/TP and another protocol or function by providing pluggable communications modules that avoid tedious software configuration.

A branch circuit monitoring system (BCMS) for monitoring branch circuit currents in one or more electrical circuit panels is described. The system is comprised of a data center server, one or more panel processors, each with one or more collection devices, and one or more current sensors per collection device. The BCMS is designed to be installed entirely inside the panel without the need for a dedicated enclosure or power supply to facilitate ease of installation and low-cost. The BCMS also allows for future upgradability through standard software updates so that the system can be updated or patched easily. The BCMS data center server collects, aggregates, stores, and serves historical branch circuit current data from the panel processors to networked users via a web server to provide visualization of data such as tables, charts, and gauges. Finally, the BCMS interfaces to third-party software suites using industry-standard protocols such as Modbus® TCP and BACnet™ for integration with data center infrastructure management or building management system software.

Techniques and solutions are provided for performing automated device discovery over a network operating according to the building automation and control network (BACnet) protocol standard (a BACnet network). For example, automated device discovery on a BACnet network can be performed via automated processing of BACnet traffic without going through a manual discovery and configuration process, and without binding to BACnet devices. For example, who-is and I-am BACnet messages can be used to identify BACnet devices on the network and their property values can be read and displayed (e.g., in a dashboard interface). BACnet devices can also be queried to determine their supported properties.

The invention relates to a repairing device and a repairing system for an air replacing environment. The repairing system comprises at least one repairing device for the air replacing environment, and a central unit, wherein the repairing device has a function of repairing the environment; the central unit is connected with the repairing device for the air replacing environment; an onsite controller is connected with an accessing device of a control system through a communication line; and the accessing device of the control system is connected with a BACnet building automatic control system. According to the invention, carbon and oxygen replacement and energy storage are creatively combined and integrated; a plurality of scientific leading technologies, such as solar energy comprehensive utilization, plant cultivation, energy storage, wired and wireless intelligent control, BACnet intelligent system, wireless passive energy collection, air condition and energy conservation and wind energy, are combined; the environment repairing, air replacement and renewable energy source storage volume are designed according to local conditions; the repairing device can be used for commercial and civil indoor air environment IAQ (Indoor Air Quality) repairing, is connected with the present building automatic control system, is used for large-size urban environment repairing engineering, is used for automobile exhaust treatment and can be formed into a large-size environment repairing system.

The invention relates to a central air-conditioning control method based on BACnet (building automation control net) object ID (identification). According to the method, the BACnet object ID is defined, communications information transfer is carried through a BACnet gateway among equipment based on BACnet protocols, the BACnet object ID is shown in communication messages of the information transfer, and the state of controlled equipment is judged according to the comparison between each section of binary codes of the ID and the form of the defined BACnet object ID. The invention also relates to a central air-conditioning control device using the control method. The instance number part of the defined BACnet object ID is further defined, the specific identity information of the equipment is shown, one BACnet gateway can be used for transferring the communication of a plurality of devices and a control center, the gateway cost is saved, and the engineering wiring is simplified.

The invention provides a Lora switch detector, a device switch detection system, and a signal processing and signal separation method. The detector comprises a shell, an MCU circuit, a radio frequencyunit, a management circuit, a frequency compensation circuit, a Modbus management control circuit, a Bacnet management control circuit, a watchdog circuit, an external relay circuit, an RS232/RS485 interface, an indicator lamp circuit and power management circuit. The networking device of the Lora switch detector provided by the invention has the advantages of simple structure, stable transmission over a long distance, dynamic network, low power consumption and low cost.

Operations of a building facility monitoring device and an IP network monitoring device are coordinated with each other. In a connection system of a building facility device managing system, when a status of the IP network monitoring device is changed, a monitoring-device-status managing unit 301 provides parameter information unique for a BACnet protocol to the changed status and stores it. If the status is not an operation command, a coordinated-packet-generation transmitting/receiving unit 302 generates a packet of the BACnet protocol based on a status and parameter information of a specific IP network monitoring device to transmit it to a building facility device managing system 103. If the status is the operation command, it acquires a status and parameter information of the specific IP network monitoring device from a management database 401, and generates a packet of the BACnet protocol based on the status and the parameter information to transmit it to the building facility device managing system 103.

The invention discloses a building automatic control system based on a building automatic control network (BACnet) and an European installation bus (EIB) protocol and a dual-protocol conversion method thereof. The building automation system consists of BACnet subnets connected through Routers or network bridges, EIB bus subnets connected through BACnet/EIB gateways and a BACnet monitoring center. The gateways are respectively connected to BACnet/multi-service transport platform (MSTP) subnets and the EIB bus subnets through MSTP modules and EIB bus coupling units. Gateway software consists of a BACnet message analyzing unit, an EIB message analyzing unit and a BACnet/EIB protocol conversion unit. The BACnet/EIB protocol conversion unit comprises a dual-protocol address conversion module, a dual-protocol advanced configuration and power interface (APCI) conversion module, a dual-protocol application program data conversion module, a dual-protocol address contingency table and a dual-protocol APCI comparison table. The BACnet/EIB gateways integrate the EIB into the BACnet, and two types of building automatic control protocols complement each other's advantages to enable the building automatic control system based on the EIB and the BACnet to have excellent cost performance.

The invention discloses a routing function-based apparatus for mutual conversion of Modbus network equipment and building automation and control networks (BACnet) Ethernet network equipment and a conversion method thereof. The conversion apparatus comprises an ethernet network interface, a control unit, a serial interface and a working power supply. The working power supply is respectively connected with the network interface, the control unit, and the serial interface as well as is used for supplying power for the network interface, the control unit, and the serial interface. The control unit is used for carrying out parsing, route orientation and repackaging on a Modbus message and a BACnet Ethernet message. The network interface is connected with the control unit and is used for receiving message data sent by the control unit and forwarding the message data to the ethernet network. And the serial interface is connected to the control unit and is used for receiving message data sent by the control unit and forwarding the message data to a Modbus network. According to the invention, the apparatus can be used conveniently with low power consumption; Modbus equipment can be directly packaged into BACnet equipment; transparent management, operation and debugging on the Modbus equipment in the BACnet environment can be realized; and an application value of the system integration is also improved.

The invention discloses a water-cooling-storage energy-saving central air-conditioning management system and relates to the field of central air conditioners. The water-cooling-storage energy-saving central air-conditioning management system comprises a workstation, a machine room system control cabinet and a tail-end area control cabinet, wherein the tail-end area control cabinet is connected with the machine room system control cabinet through a BACNET protocol of an RS485 bus, and the machine room system control cabinet is connected to the workstation through the network. Via central control of the tail end of an air-conditioner area, data of the site and inside the air conditioners can be acquired in real time and fed back to a DDC direct-digital controller in time, and optimal management of the system is realized by synchronous changing as requirements of empirical calculation and tail-end load. The water-cooling-storage energy-saving central air-conditioning management system is provided with four operating modes including direct cooling, water storage cooling, low-temperature water cooling and combined cooling. By means of peak-valley prices, cooling capacity is stored in a low-temperature water manner, stored-water cooling capacity is used during peak power consumption hours, and starting times of a main unit can be reduced as far as possible or less starting is realized, so that resources are saved.

Disclosed is a building management system which includes a BACnet gateway including a protocol converter which receives data in a remote communication protocol format and converts the data according to a BACnet communication protocol, a central controller which connects to the BACnet gateway and controls a sub-system of a building, and a watt-hour meter which measures a wattage of the sub-system and transmits wattage data to the protocol converter using the remote communication protocol format.

The invention relates to a remote monitoring and acquisition system of an electricity meter, in particular to a fieldbus type network monitoring system of an electricity meter based on BACnet (a data communication protocol for building automation and control networks). Aiming at overcoming the defects of the prior art that a large amount of labor and materials are needed for manual meter-reading monitoring, the invention provides the fieldbus type network monitoring system of the electricity meter based on the BACnet. The monitoring system of the electricity meter adopts three-stage control, a plurality of field controllers are adopted for lowest-stage control, area control stations are adopted for second-stage control, and a central control station is adopted for third-stage control; and the three-stage control nodes adopt a BACnet connection for communication, and the field controllers are BACnet dispersible programmable microprocessors. The fieldbus type network monitoring system of the electricity meter based on the BACnet is characterized in that each BACnet dispersible programmable microprocessor has a random-access memory (RAM) data memory unit which stores a dynamic private key corresponding to an address, and the private key can be updated when in restarting each time.

The present invention relates to building self control field, especially a field control unit virtual control method. The present invention maps field control unit data as field control unit BACnet protocol object, utilizing tide list object reading field control unit inner history data through BACnet protocol read range service, thereby to substitute physical control unit which needs controller but without I/O point connection, using standard BACnet object and service pattern to access other system disagreed with BACnet protocol into field control system, mapping powerful database server as standard BACnet object for other controller reading data. After system existing virtual controller, workstation software no longer needs any special function (such as MODBUS protocol, OPC interface, data base interface etc), as long as capable of realizing standard BACnet protocol, only needing providing convenient man-machine interface.

The invention provides a method, equipment and a system for realizing video monitoring integration. The method comprises the steps as follows: setting a stream associated object, a stream associated object attribute and a stream associated service according to a BACNET protocol standard; calling the stream associated service and controlling and transmitting stream data between a video monitoring controller and a client according to the stream associated object and the stream associated object attribute; sending the captured and analyzed stream data to a BACNET controller through the video monitoring controller to enable the BACNET controller to obtain cooperative information from the analyzed stream data to cooperate with other weak electronic systems. The equipment comprises a predefinition module, a work module and a cooperation module. The system comprises arbitrary video monitoring integration equipment. Through the method, the equipment and the system, the inter-operation among the video monitoring system and other subsystems is achieved.

The invention discloses a device and a method which are applicable to mutual conversion between building automation and control network internet protocol (BACnet IP) equipment and BACnet Ethernet network equipment. The device comprises an Ethernet network interface unit, a control unit and a working power supply, wherein the working power supply is connected with the network interface unit and the control unit respectively and provides working power for the network interface unit and the control unit; the control unit analyzes and re-encapsulates a BACnet IP message and a BACnet Ethernet message; and the network interface unit is connected with the control unit and is used for receiving message data transmitted by the control unit and forwarding the message data to the Ethernet network. The device is convenient to use, is low in energy consumption, and can be applied to network equipment which utilizes a BACnet Ethernet communication protocol as a main communication protocol to convert the protocol into a BACnet IP communication protocol; thus, greater application and development values are brought to BACnet Ethernet communication protocol equipment.

The invention discloses a novel Internet of Things information platform combining a sensor and radio frequency identification (RFID), which is used for assisting in managing and controlling building equipment and improving the building facility management level in the building engineering construction and operation maintenance stage. The method comprises the following steps: building an information platform of the Internet of Things, wherein the information platform comprises a sensor, an RFID, a visual platform and a database technology; configuring a sensor Internet of Things network; reading and writing equipment information by adopting an RFID technology; enabling the sensor technology obtain environment state information and operation state information of the equipment; reading and writing data of the direct digital control device based on the BACnet standard, and the direct digital control device is used for controlling and managing building systems such as an HVAC system, an illumination system and a fire fighting system in real time, and establishing a database for storing equipment data. According to the design, the data of the sensor are visualized in a three-dimensionalbuilding information model (BIM) platform, so that a manager can conveniently retrieve and accurately check the information, and the building equipment can be conveniently managed.